<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body,ul,li{margin:0;padding: 0;}
    body{
      width: 100%;
      height: 100%;
      overflow: hidden;
      background-image: url("west/bg.jpg");
      background-repeat: repeat-x;
      /* background-position:-1900px 0; */
      animation: bg 60s linear infinite;
    }
    @keyframes bg {
      from{background-position: 0 0;}
      to{background-position: 1900px 0;}
    }
    ul{
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;     
      /*
      left:50%;
      margin-left:-450px;
      */
      bottom: 100px;
    }
    ul li{
      width: 200px;
      overflow: hidden;
      margin-left:20px;
    }
    ul li:first-child{
      margin-left:0;
    }
    /*
    ul li:nth-child(2){
      width: 170px;
    }
    ul li:nth-child(4){
      width: 210px;
    }
    */
    ul li>img{
      width: 1600px;
      animation: move 0.1s steps(8) infinite ;
      /* 时间数字越小，四人走的越快 */
    }
    @keyframes move {
      from{margin-left:0}
      to{margin-left:-1600px}
    }
  </style>
</head>
<body>
  <!-- <div class="bg"><img src="./west/bg.jpg"></div> -->
  <ul>
    <li><img src="./west/wk.png"></li>
    <li><img src="./west/ts.png"></li>
    <li><img src="./west/bj.png"></li>
    <li><img src="./west/ss.png"></li>
  </ul>
</body>
</html>